Automatic drawing from point list using topological codes
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2ND CAJG 2019
Automatic drawing from point list using topological codes Dalibor Bartoněk 1 Received: 10 May 2020 / Accepted: 6 October 2020 # Saudi Society for Geosciences 2020
Abstract The paper deals with the possibility of automatic drawing from the list of points with coordinates, created by geodetic surveying in the field. The text contains a design of topological codes which enable this automatic drawing. The part of the solution is also a design of application in Python language for generating drawings in a geographic information system (ArcGIS, QGIS). The result of the automated process is the conversion of spatial data into vector form, with maximum utilization of the information contained in the input data and with a minimum of manual work. This method involves a shift from classical field surveying to an object-oriented approach of this process. Application of the method speeds up the process of creating a 3D wireframe model by 35% compared to a classical method. The method was verified during the survey of the church in Karviná, the Church of Virgin Mary of the Snow in Velké Karlovice, and family house in Blansko (all in the Czech Republic). Keywords List of points with coordinates . Topological codes . Automatic drawing . 3D model
Introduction The surveying of geographic objects (GO) in the field is a common geodetic activity. The result of this activity is, in many cases, the documentation of the targeted GO in 2D— typical of the needs of the cadaster of real estates or in 3D, for example, in the case of surveying the actual construction of buildings. Regardless of the geodetic method used, the entire processing chain according to Fig. 1 is as follows: 1 Surveying of the object in the field by a suitable geodetic method. 2 Transform data into a valid coordinate system. 3 Import the list of points with x, y, z coordinates into suitable software. 4 Uniting imported points in CAD/GIS software.
This paper was selected from the 2nd Conference of the Arabian Journal of Geosciences (CAJG), Tunisia 2019 Responsible Editor: Biswajeet Pradhan * Dalibor Bartoněk [email protected] 1
Brno University of Technology, Veveří 95, 602 00 Brno, Czech Republic
5 Creating documentation or 3D model of GO in graphics software. 6 2D, 3D documentation, digital reconstruction, visualization, virtual reality, and further usage of results.
The individual processes ad (1)–ad (6) are currently either relatively highly automated or with high support of hardware or software (e.g., surveying of GO in field). The weakest part in the processing chain of Fig. 1 is the connection of the imported points, which, in many cases, is done manually (in Fig. 1, it is marked by a double box). At present, there are several applications trying to solve this problem. It is mainly about the addition codes to the list of points, which are used for automated drawing directly from the list of points GISOFT (2017) and Coding (2017). The application works in 2D and is primarily used in the cadaster of real estates. The principle of that is to
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